Continuing the discussion from Beta Project: RyanL's Hello World:
Figured I would start a new Thread.
First attempt, well actually second…(first one burned through)
Don’t have time today to tweek this…would like to see if I can get the lines darker. Vector etched on 100% cotton T-shirt. (Undershirt weight…)
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That’s just “AWESOME”
Soooo cool! Does it weaken the fabric?
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Another great idea. Thanks
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Doesn’t seem to, but I’ll have to do the laundry test just to make sure…
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Ooh. Any idea how it reacts with dyed or printed areas?
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There’s this one too:
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Different fabrics will get different results. The tribal cat above was on 100% cotton…haven’t done poly blends except for fleece.
This was raster etched though.
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Looks great. I can’t wait to try velvet. Hoping it gives a nice crushed velvet look. Would be great to engrave a name or pattern in it and cut to fit as a fancy box liner. Especially if the edges seal well when laser cut.
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Thanks again. It is one of the things I was really hoping to do with the GF is custom t-shirts.
Oh, and KITTY!
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I do screen printing as a hobby and I’m so glad you posted this. I know there has been some posting of laser on jeans, but tshirts are my thing!!! This type of thing might be my first thing I try. Here are some of my goofy designs;)
https://www.teepublic.com/user/splatty
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For velvet you would have to get just enough to singe the top layer away without hitting the back fabric sort of like with the fleece. I considered doing that for my liners for the boxes but I had fleece in the office…lol
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I do a lot of crewel embroidery and this looks perfect for transferring designs to fabric. This is very, very exciting! This would be so much easier and more accurate than tracing a design onto fabric, and a lot faster than screen-printing (which is overkill for only making one of something).
For example, here’s a recent project when I’d just started it, so you can see the lines marked on the fabric. (Note that this was a commercial kit so the fabric was already printed; so far I’ve never tried to draw my own designs this complicated.)
And in case anyone’s curious to see how it turned out, here it is a month later when I’d finished all the embroidery:
Custom designs would be so much better if I could use the GF to simply “print” the image onto the fabric before embroidering. 
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Did it hurt when it burned through? 
Could be a neat tattoo.
Do you think that marking fabric will cause the fabric to weaken?
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I didn’t read all of the posts before I posted. Sorry.
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Very cool stuff! I’ll almost certainly be throwing my jeans into the Glowforge soon after I get it.
And I think I can add something somewhat relevant to this thread. At work we use a CO2 laser (I believe it’s a 30 watt laser) to mark date codes into our bottles.
Here’s an example:
The labels are blue (and sometimes other colors) on the front, and the back is white. The laser is able to vaporize a very thin layer on the front side revealing the white paper underneath. I’m not sure what it would take to replicate this on a standard cutter/engraver, but it would sure be fun to try! 
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Russ at SabarMultimedia again has a relevant video printing fabric, a tshirt.
Edit: Shoot. Posted before finishing original topic. Ok, a little repetition.
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What happens when you laser HTV on the shirt? Would it adhere … Although I think they do make laserable HTV (Heat Transfer Vinyl ) for that (maybe?). Or is HTV really vinyl and the laser releases fumes that a heat press doesn’t… Just kind of thinking as Im typing away…